Effect of eppawala rock phosphate (ERP) and triple super phosphate (TSP) on growth of cowpea plant (Vigna unguiculata L.) in sandy regosol soil

Effect of eppawala rock phosphate (ERP) and triple super phosphate (TSP) on growth of cowpea plant (Vigna unguiculata L.) in sandy regosol soil

Modshayini, Sundaralingam
URI: http://www.digital.lib.esn.ac.lk/handle/123456789/2762
Date: 2017

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